The Altitude Chelsea has gone Ultra with newly added features that provide extreme comfort and durability. Design features include an improved and highly durable full-grain leather upper. You'll be out the door in no time as the easy slip-ons provides a secure fit. The OrthoLite Impressions slow recovery foam provides superior underfoot cushioning while the EVA midsole absorbs impact to keep you comfortable on your feet all day. Multi-Directional (MDT) rugged rubber outsole provides grip on almost any surface.