Flame retardant mattress cover

1. Flame retardant core-spun yarn inner sleeve (permanent)? specification: 33″×98″, 34″×100″, 42″×115″, 51″×125″
2, flame retardant domestic viscose inner sleeve (permanent)? specifications: 34″×108″, 43″×115″, 51″×125″
3, ordinary viscose post-processing inner sleeve?? specifications: 34″×108″, 45″×115″, 51″×125″
4, cotton polyester post-processing inner sleeve specifications: 34″×108″, 45″×115″, 51″×125″