Running
Up and Under Trail Running
Welcome to the Trail and Ultra Running section of our website. Up and Under in Cardiff has been supplying fell running specific footwear for years, but has expanded into the wide ranging and glorious world of trail running in the past 10 years. We have a close working relationship with a number of trail and ultra race organizers in the area, most notably Run Walk Crawl, Ridge Runners and Up Hill Down Dale and have therefore expanded our range to cover Ultra Running products that can help you race on all terrains, through day and night, for 4 seasons of the year.
A lot of our core clothing ranges and equipment such as headtorches, first aid kits, whistles, etc. are equally appropriate for trail-running so don't forget to take a look around those sections or use our search if what you need isn't immediately obvious within this part of our catalogue.
We select the best trailshoes, packs, poles, vests, torches and clothing from baselayer through socks, shorts, tights and insulation to windproof and waterproof shell, hats and gloves and we have what you need for all your fell and trail-running needs, all carefully selected by our staff with insights from Run, Walk Crawl to suit you. It's all from the best brands, but see the quick links below to rapidly access some of our most popular. It's also worth having a browse outside of running through our Odlo range for extra warm quick drying, high wicking, lightweight base and midlayer clothing and everything beyond.
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INOV8
Racepac 4
The INOV8 Racepac 4 is a unisex running hydration pack designed for shorter training runs and races up to half marathon distance. With a 4-litre capacity, it provides ample space for all your essentials. The front pockets comfortably hold two 500ml soft flasks, while the rear compartment fits a 2-litre hydration bladder (flasks & bladder sold separately). There's also extra space for nutrition and energy gels to keep you fuelled on the trails. Stay hydrated, energised, and comfortable with the Racepac 4, the perfect companion for trail runs and outdoor adventures.
INOV8
Racepac 8
The INOV8 Racepac 8 is a lightweight, zero-bounce hydration pack designed for ultramarathons and long-distance trail runs. Its 8-litre capacity accommodates two 500ml soft flasks in the front and a 2L hydration bladder in the rear (sold separately), offering up to 3 litres of fluid storage. Four quick-access pockets keep essentials handy, including a zipped pocket with a bungee loop for valuables. The breathable air-mesh wicks away sweat, while adjustable chest and waist bungees ensure a secure, bounce-free fit. With two trekking pole attachments, the Racepac 8 delivers optimal storage, hydration, and comfort for endurance athletes.
INOV8
Active Tights Women's
The INOV8 Active Tights Women's are high-stretch, quick-drying running tights designed for everyday training. Made with 70% recycled polyester and brushed elastane, they offer soft-touch comfort, full freedom of movement, and a higher waist for a secure fit. Featuring a no-bounce phone/gel pocket and a rear zip pocket, they keep essentials secure while you run. Reflective detailing enhances visibility on trails and roads, making them a must-have for winter training.
OMM Ltd
Ultra Bladder 2.0l
The OMM Ltd Ultra Bladder 2.0L is a lightweight, durable, and leakproof hydration system for runners, hikers, and outdoor enthusiasts. Compatible with all OMM packs, it features a fast-flow bite valve with a shut-off, a wide slide-top opening for quick, spill-free filling, and an internal baffle to reduce sloshing. The flexible, non-kinking tube ensures steady flow, while the leakproof disconnect system prevents drips. With a fill scale for tracking and BPA, PVC, and phthalate-free materials for safe hydration, it’s built for any adventure.
OMM Ltd
Ultra Flexi Flask 350ml with Bite Valve - Twin Pack
The OMM Ltd Ultra Flexi Flask 350ml with Bite Valve (Twin Pack) is your go-to hydration upgrade for running, hiking, and fast-paced adventures. Each 350ml soft flask is made from tough yet flexible TPU that compresses as you drink, so there’s less bounce and more comfort on the move. The bite valve straw gives you spill-free sips, while the wide opening makes refilling and cleaning super easy, and they’re BPA-free too.
OMM Ltd
UltraFire 5 Vest
The OMM Ltd UltraFire 5 Vest is a lightweight, breathable, and secure running vest, perfect for trail runners, marathoners, and ultra-endurance athletes. It features a 5L weather-resistant roll-top compartment, 7 quick-access front pockets, and space for 2 500ml soft flasks, as well as a 2L bladder for hands-free hydration. The ergonomic, bounce-free design ensures stability without restricting breathing, while reflective details enhance visibility. Built with durable, stretch mesh fabric, the UltraFire 5 Vest will keep you comfortable and prepared on every run.
OMM Ltd
TrailFire Vest
The OMM Ltd TrailFire Vest is a lightweight, high-performance running vest designed for speed and comfort on fast runs and races. Its ergonomic fit secures at the shoulders and diaphragm for unrestricted breathing, while stretch mesh minimizes bounce and keeps essentials close. With seven easy-access pockets and a rear mesh compartment for a hydration bladder or extra gear, it offers efficient storage without bulk. The vest supports multiple hydration options, fitting 2 x 500ml soft flasks up front and a 2L bladder in the back, with the option to expand capacity by 5L using the OMM Compressor Pod.
OMM Ltd
Dyno Cap
The OMM Ltd Dyno Cap is a lightweight, packable running cap built for athletes and outdoor adventurers. Made from 4-way stretch Flexile Nylon with a DWR finish, it offers wind and water resistance, UPF 30 protection, and all-day comfort. The flexible peak shields against the elements and packs down easily into a pocket or vest. At just 35g, it delivers maximum performance with minimal bulk, perfect for mountain trails and summer adventures.
OMM Ltd
Nitro Tee S/S
The OMM Ltd Nitro Tee S/S is an ultra-light, super-fast drying performance base layer designed for trail running, road running, and ultra-distance adventures. Made from 4-way stretch nylon, it delivers a barely-there feel, wicking moisture and drying quickly to keep you cool in warm conditions. With near-zero insulation and high air permeability, it sheds heat even during intense efforts, while the soft, closely woven fabric ensures next-to-skin comfort and easy layering in cooler weather. Lightweight, breathable, and designed for peak performance, the Nitro Tee is perfect for runners who want comfort without extra weight.
OMM Ltd
Dyno Shorts (W)
The OMM Dyno Shorts (Women's) deliver premium comfort and performance for runners. Featuring a bonded, stitch-free design to reduce friction, they offer a lightweight and breathable fit with 4-way stretch for full mobility. The 6” inseam shell is wind and water-resistant, while the moisture-wicking, quick-drying liner ensures chafe-free support on long runs. An extra-wide waistband, secure zip pocket, and athletic fit make them perfect for training, racing, and trail running.
OMM Ltd
Dyno Shorts
The OMM Dyno Shorts deliver premium comfort and performance for runners. Featuring a bonded, stitch-free design to reduce friction, they offer a lightweight and breathable fit with 4-way stretch for full mobility. The 6” inseam shell is wind and water-resistant, while the moisture-wicking, quick-drying liner ensures chafe-free support on long runs. An extra-wide waistband, secure zip pocket, and athletic fit make them perfect for training, racing, and trail running.
OMM Ltd
Rotor Vest
The OMM Ltd Rotor Vest delivers exceptional warmth-to-weight performance with PrimaLoft® Gold with Cross Core insulation. Weighing just 128g, it’s perfect for layering in cold conditions or throwing on at summits. The wind and water-resistant shell protects against the elements, while the mesh-backed stuff pocket doubles as a vent. Highly packable, it folds into its own pocket for easy storage. Designed for the toughest conditions, this vest offers lightweight warmth, breathability, and protection without bulk - ideal for fast-moving adventures.
OMM Ltd
Ultra Flexi Flask 350ml with Bite Valve
The OMM Ltd Ultra Flexi Flask 350ml with Bite Valve is a lightweight, collapsible soft flask that compresses as you drink, reducing sloshing and suction effort for a smoother flow. Made from durable TPU with extra grip, it’s easy to squeeze for gels or liquids and features a leakproof bite valve to prevent spills. The wide opening allows for quick filling and cleaning, while the interchangeable straw option adds versatility. BPA, PVC, and phthalate-free, this compact, easy-to-store flask is perfect for runners, hikers, and endurance athletes.
OMM Ltd
Ultra Flexi Flask 500ml with Bite Valve
The OMM Ultra Flexi Flask 500ml is a lightweight, collapsible soft flask designed for effortless hydration on the move. Made from durable TPU with extra grip, it compresses as you drink, reducing sloshing and suction effort for a smoother flow. The wide opening allows for easy filling and cleaning, while the leakproof bite valve ensures no spills. With an interchangeable straw option, it’s perfect for runners, hikers, and endurance athletes. BPA, PVC, and phthalate-free, this slim, flexible, and easy-to-store flask keeps you hydrated without extra bulk.