Shark SV1106 Foam Filter. Designed by FilterBuy to Fit Shark Navigator Freestyle Cordless Stick Vacuum. Shark Part # XF1100. Vacuum FilterBuy: Breathe Better! 1 Shark SV1106 Foam Filter. Premium Allergen Filter Designed by FilterBuy. Designed to fit Shark Navigator Freestyle Cordless Stick Vacuums with 7.5 inches diameter.