It's hard to find vintage boys department store double-back briefs anywhere online but you can still find them advertised in old catalogs for sale. Here is one from the 1970's that shows dashes on the waistband and a soft double-fabric back for durability and absorbency.
Vintage catalog ad from the 1970s featuring a male model wearing all white briefs that sports a dash waistband. A box to the left showing the brief features a double-back which was common in both men and boys briefs in that time period.
Up until August 1989, this ad was probably helping moms take notice that these particular boys briefs were not double-seat. Apparently even as the 1980's were about to give way to a new decade, single or double-back briefs were two options that were still available and hence spelling it out cleared up any confusion regarding the product.
Over the years, we have collected catalogs and newspapers featuring men's and boys briefs. Some of the oldest ads date back to the mid 1950's. To our surprise, a well known national brand and even a major department store in 1957 offered double back briefs for both boys and men. The double fabric panel seat were described in a variety of ways, such as "Double-Back", "Double-Seat" with even one store coining the phrase as "Action Back". Adjectives emphasizing it as extra "Thick", "Comfy", "Absorbent" and "Long Wearing" were furthered used to help enhanced this feature.
Today, Tiger is the only USA underwear company that has been offering this American classic in a variety of fabrics, colors and prints. Ten years in the making, Tiger makes the underwear "Like You Wore Before".
These quality briefs have not been available in department store since the 1980's as shown in this color paper ad. Fortunately Tiger Underwear has brought back an almost exact replica of this double seat brief as shown above for boys.
Note: the selection of men's are going quick, get yours before they are no longer available!