H FI. Uno_S5 “ The all-round training & racing short”H FI. Uno_S5 is the 6-panel ASSOS half-short. It is the no-bib version of FI. Uno_S5, & incorporates the new FI. Uno_S.5 insert, which is slightly thicker than the FI.13_S5 insert. H FI. Uno_S5 is perfect for warm conditions, hot Summer days & indoor cycling. It can also be worn as a first layer, underneath Winter tights.