As an alternative to classic neoprene sleeves for iPads, SwitchEasy has developed Thins ($40), which use more advanced manufacturing techniques -- heat-sealing and precision trimming -- to achieve similar results, minus the need for any stitching. With pill-shaped Velcro closures inside its top flap and a rubber-like, color-matched glued edge to hold the microfiber-lined neoprene front and back pieces together, Thins has enough space inside to hold…