You'll find these inside your better comforters, especially the ones that are down and feather filled. They are three-dimensional boxes that are made of stiffer fabric and allow maximum thickness for the fill while maintaining even distribution of filling within the boxes. Minimize shifting and migration of fill for maximum comfort and support. Your comforter will last longer and stay nicer for much longer. Essential feature to look for when buying more expensive comforters with better down and feather fill.

Internal three-dimensional fabric wall boxes allow maximum thickness and comfort while maintaining even distribution within the boxes. Minimizes migration of fill for maximum comfort and support!-- google_ad_client = "pub-7125597699069942"; google_ad_width = 468; google_ad_height = 60; google_ad_format = "468x60_as"; google_ad_channel ="8577566263"; google_ad_type = "text"; google_color_border = "FFFFFF"; google_color_bg = "FFFFFF"; google_color_link = "000000"; google_color_url = "008000"; google_color_text = "000000";

Three-dimensional boxes sewn within a comforter shell that prevent enclosed down from shifting and lumping.