Via Vellum Bright White Envelopes - A7 (5 1/4 x 7 1/4) 70 lb Text Vellum 30% Recycled 250 per Box Contains 100 pcs assorted colors rainbow balloons. Latex balloons have been rigorously tested and selected manually Party balloons are made with strong natural rubber latex. It is best birthday balloons for kids party Use colorful balloons for decorating birthday party, rainbow party, unicorn party, baby shower, bridal shower Helium balloons are the best party favors for kids multi colored parties, supplies for balloon arch and trolls party Colored balloons are the best party accessory for all ages, blow them up with either your mouth, pump or helium