New and Classic Features only Otter Provides. The XT X-OVER Shelters are tough, durable and warm with the ultimate in functionality and versatility. The new X-OVER Shelters are rich with cutting edge design and engineering features that will enhance any ice fishing experience. X-Over Side Entry Doors - Combine traditional front door entry with a Quick Switch to side door configuration. Sets up like traditional shelters and converts to side access in seconds. EZ Lock Assembly - Reduces frame assembly time by 75% by eliminating framing screws. Featuring a super strong oversize square tube aluminum frame with Ultra-Glide System. Quilted thermal inner shell locks in warmth and reduces condensation.