An easy to use, universal, simple, lightweight, compact, portable, dynamically configurable system of concealment and shelter. An operator configures a number of concealment blinds or shelters using shafts and covers or shells. Some embodiments include user adjustable domes. A hubless, dynamic blind or shelter comprises two or more cover shafts and an adjustable strap which provides a freestanding, flexible frame. The frame is covered with a cover or skin. The cover adjusts to the dynamic changes in the frame. In one embodiment the cover is an elastic net that changes shape but maintains tight skin. In another embodiment the cover has expansion panels and lace. Embodiments include layout blinds and boat blinds which incorporate a quick release clip 1260, and which may be used to observe or hunt waterfowl. The system includes a low cost method of tightening the skin on a cover to reduce wind movement and noise.