The Mountain Trainer is for trail running and lightweight hiking

Both models feature a traditional toe box'Post is known for his split-toe design'and a 'Y' shape that mirrors the natural form of the foot. They are snug and secure through the mid-foot and heel, but roomier in the toe box so the toes can spread and splay naturally.

While Topo Athletic footwear magista obra contains features associated with minimalism'lightweight construction, natural shape along with a zero-drop platform'Post says they aren't minimalist shoes.

The medium stack height (12-19 mm) provides more protection and shock absorption underfoot than what can be found in a typical minimal shoe (4-10 mm), while still allowing the foot to gather feedback in the environment, and move more naturally. The two-density EVA midsole also affords insulation from sharp rocks and roots.

Beginning today, Tuesday, Nov. 19, the Speed Trainer could be preordered online. Shipping will begin Dec. 1 and the shoe is going to be offered at that point in select stores. The Mountain Trainer will launch exclusively with REI January 2014 after which to some wider retail distribution starting Feb. 1.Topo Athletic has added two new ergonomically designed shoes to its line of footwear that encourages natural movement: the rate Trainer (ST) and also the Mountain Trainer (MT).

The Speed Trainer (MSRP $90) is made for speed training (because the name suggests), tempo runs and racing. The Mountain Trainer (MSRP $100) is for trail running and lightweight hiking.

'Athletes get trained in both urban and natural environments therefore it is essential for us to provide lightweight versatile footwear crampon hypervenom that's rugged enough to be worn around the trail and the road,' said CEO Tony Post.