311 of clothing 210 can take place in punctiform manner as indicated at 242 in fig7 these punctiform or spot welds are then formed in an approximately columnar manner however fig7 shows a differently formed welded zone 240 e g in the form of webs as indicated at 241 these web like welds 240 are staggered relative to one another so that the air guided through the inner area 213 of clothing 210 can flow in the direction of arrow x xi and x2 however the weld webs 241 can also be constructed in cross like manner as indicated at 341 in fig7 here again there is advantageously a displaced arrangement and association of the cross webs the hot air is supplied to the inner area 213 of article of clothing 210 via a hot air supply connection 230 constructed as a flexible hose and connected to a hot air generator constructed in per se known manner and not shown in the drawing the hot air generator can be constructed as a heat exchanger connected to the internal combustion engine of a vehicle or motorcycle a blower can be used for forcing hot air through the hot air supply connection 230 into the inner area 213 of the clothing 210 the connection of the hot air supply connection 230 to one of the two layers 211.