Here's what other sites are saying:
From early morning training runs all the way up to the main event, the Ultimate Direction OCR Vest is a valuable tool for the dedicated obstacle course racer. This running vest was designed specifically to meet the demands of rugged races and the long hours of training it takes to tackle huge obstacles and gnarly terrain. It's made with an ultra-durable nylon rip-stop fabric that withstands abrasions from tree branches, obstacle walls, and don't forget all that mud. The compressible main compartment can fit up to a 2L hydration reservoir for hands-free hydration that won't have you stopping at every water station, and if hydration packs aren't your thing, you can use that compartment for extra layers and snacks, then reach for the front water-bottle pocket for quick access to a smaller bottle. The shoulder straps also feature two zippered pockets for energy gels and other essential items, as well as a water-resistant phone pocket that keeps your smartphone dry in wet and muddy conditions. This pocket is also clear, so you can film your whole race, then look back on it to help you train, or just cut it up into a sick edit.
"Ultimate Direction Men's Apparel Clothing OCR Vest Onyx Medium/Large 80465518ONXM/L. We have made the first-ever pack for OCR using 30+ years of athlete-driven design experience. This is the vest you need for OCR because it's made of a very durable nylon rip-stop fabric that holds up to the abuse of water mud and abrasion against walls the ground and other hazards along the course. It's also a perfect training vest because it has enough capacity to carry hydration along with extra clothes and food. Minimal yet durable boasting just enough storage to get you through a long race without weighing you down. - Outside Online This is definitely the only vest I would trust to withstand a race environment. - Obstacle Racing Media"