Assertion: skater's boot | /r/MadeOf | synthetic materials
Facets:
value: with heat-modifiable linings
type: OTHER
Source sentences:
text: Traditionally, the boots are made of leather, but in recent years, boots made of synthetic materials have become more popular.
text: In recent[clarification needed] years, boots made of synthetic materials with heat-modifiable linings have become popular with many skaters because they combine strength with lighter weight than leather boots, and are easier to "break in.