Wand Essentials Strap Cap Harness For Dildos Black. With the Wand Essentials Strap Cap, you can have the ultimate in penetrating pleasure with a strap on harness for your wand! Simply slip your chosen dildo through one of the top or side openings, then secure over your standard size wand. Once secured, position the dildo and turn on the vibration. The cradle is made of premium silicone, so it is hypoallergenic, highly durable, and semi stretchy