Tech diving fins are a more rugged fin that work well with frog kicks and have minimal snag points. Tough rubber and monoprene materials with a short vented blade are preferred by many advanced divers for their efficiency and reliability. Spring heel straps are quick and easy to don and doff even with thick gloves. Spring heels also self adjust to compressing suits so they stay on without having to be adjusted and can't rip or tear like traditional rubber straps.