Overview Reviews Description The Resmed Swift Fx backstrap is used to anchor the mask on the face. It has only one size and comes in a standard navy blue colour. Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Resmed Resmed Swift Fx Backstrap Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments