Blindfold with Velcro closure by Saxos Wide soft Blindfold with Velcro fastener. May be the best there is. Your sub can absolutely not see anything more what You planned to do :D  Very comfortable with soft lining inside and made ​​of 100% polyamide.  Adjustable by Velcro closure from 44 - 65 cm Color Black Made in Germany 

Leather Blindfold with soft padding by Saxos Adjustable strap allows this leather blindfold to be pulled snugly around the head. It fits comfortably and cuts off all light! Leather lined, and with very soft comfortable padding. color black made in Germany both sides and strap real leather quality leather BDSM Gear    made in Germany

Adjustable by Velcro closure from 44 - 65 cm. width: 10 cm, Color Black. Made in Germany

Black Leather soft padded & laced Blindfold isolation Mask by Saxos Did you ever wanted a blindfold wich is realy closed? No prints from straps in your face, comfortable to wear for longer time, and do you think a fully closed isolation mask is to smothery? Then try this one :D The best Isolation mask / blindfold you can get! Very soft padded and lined with soft leather and open on top of your head, The feeling and smell of the real soft leather makes this isolation mask a real must have!  quality leather BDSM Gear     made in Germany