LUCID 4 Inch Gel Memory Foam Mattress Topper - Ventilated for Optimum Tempera... The item "LUCID 4 Inch Gel Memory Foam Mattress Topper Ventilated for Optimum Tempera" is in sale since Wednesday, October 3, 2018. This item is in the category "Home & Garden\Bedding\Mattress Pads & Feather Beds". The seller is "bitshopus" and is located in Texas, United States. This item can be shipped to United States.