The product description doesn't contain a description or details about these shoes, so here you go: Shoes are extremely light weight. They make great track-flat type shoes, and they are also easy to wear hiking or on trails because they provide a flexible bottom. If you are looking for a shoe with a thick bottom for "heel-strike" running, I wouldn't recommend these, the bottoms are very thin. With that said, the rubber on the bottom is awesomely flexible, and provides very natural movement. Shoes are very breathable, but water-resistant (not water-proof, but small amounts do bead and roll off) If you're not sure about the vibram "toe-shoes" and want something light, flexible, and that provides natural running, try these.