The Basham Race Vest is engineered from the specifications of professional Ultrarunner Amanda Basham. She had very specific requirements because the pack needed to be able to tackle some of the most prestigious races. The Basham’s defining characteristic is its incredibly small footprint which reduces weight and increases heat dissipation. Despite its size, it can carry up to 2 bottles as well as other accessories. This pack includes an UltraFlask 550 Hybrid Bottle that can fit horizontally in the insulated compartment and has room for an alternative bottle in the upper quick stash pocket. The quick stash pocket is built from 4-way stretch mesh for maximum capacity and features a magnetic closure to keep contents secure yet accessible. An additional quick stash pocket is featured on top of the insulated bottle compartment. This additional outer pocket remains functional even when the inner pocket is full. This pack features our new UltrAcool Light Mesh. This pack’s shoulder straps are narrow, have on the go access pockets, and can carry a large cell phone. Adjustment straps provide a perfect fit. One size fits most.DetailsSilicone and PU coated feather-weight nylon fabrics resist water, abrasion and tears.Lightweight, soft, breathable, but strong mesh pulls moisture away from the body to keep skin dry and cool.Plush feeling micro-fiber polyester edges, soft and non-abrasive against skin and clothing.Sweat proof webbing—won’t absorb water or get saturated and heavy.Safety stitched bar tack on all stress points.Quiet, bounce free, easy to see and use, zipper pulls.Zig zagged stitching over elastic for ultra-durability, increased stretch and rebound.Simple, fast, easy in and out bladder attachment.Magnon pocket for sweat-free pills. With automatic magnetic closure for rapid access to pills and other essentials. Patent Pending.Max 02 sternum for unrestricted breathing while maintaining a stable pack. Uses shock cord with good stretch for unrestricted breathing but also good rebound on the stretch for a stable ride. Patent Pending.Fit: Unisex / Size: Universal (Chest Size: 26″-48″)Hydration Compatible (not included): 2x UltraFlask 550 / Reservoir Compatible: Not CompatibleCapacity: 122 c.i. (2 L)Weight: 6.4 oz (181 g) without bottle, 9.4 oz (266 g) with bottleDimensions: 15″ x 2″ x 15″Hydration IncludedNot includedNot includedNot included2L Reservoir with mag-clip to secure hoseNot includedSizesSmall, Medium or LargeUniversal (Chest Size: 26″-48″)Universal (Chest Size: 26″-48″)XXS (26”-32”), XS (28”-34”), SM (30”- 36”), MD (32”-38”), LG,(34”-40”)SM (31”-36”) MD (34”-39”) LG (37”-42”)Weight10 oz (283g)7.2 oz (204 g)6.4 oz (181 g) without bottle, 9.4 oz (266 g) with bottle16.0 oz (454 g)7.2 oz (204 g)Fluid CapacityUp to 3 L214 c.i. (3.5 L)122 c.i. (2 L)854 c.i. (14 L)4 x 550 mL UltraFlask (Sold Separately)Recommended UseVersatile up to 100 miles, for ultra-racing and daily long training runs.Flexible for light and fast ultra races with frequent refueling stops; half marathon to marathon for runners who prefer to carry their own supplies; compatible with optional bottles and reservoirs.Versatile up to 100 miles, for ultra-racing and daily long training runs.Fastpacking, mountain biking, racing, ultra racing, and summit assaulting.Very lightweight race vest for the minimalist runner who prefers bottles in the back. With multiple stretchy mesh pockets available it is perfect to keep the gear organized and accessible. Ultraspire Basham Unisex Race Vest