A roll-up wound protector has a distal ring, a proximal ring, and a flexible sleeve extending between the proximal and distal rings. The proximal ring is rollable to gather the flexible sleeve around the proximal ring and shorten the length of the flexible sleeve. The cross-sectional geometry of the proximal ring may be generally s-shaped. The cross-sectional geometry may be asymmetric about the longitudinal axis and asymmetric about the lateral axis. The height along the longitudinal axis may be greater than the width along the lateral axis. The proximal ring may comprise a medial surface having a circumferential recess and a lateral surface having a circumferential recess, the two recesses being longitudinally staggered relative one another.