Plural-only nouns and counters (ett par)

Many clothing items only exist in the plural. Adjectives describing them take the plural ending (usually -a). Note that kläder (clothes) acts as an uncountable mass noun in Swedish, so use mycket (much/a lot) rather than många (many):

We pack a lot of ski clothes for the ski trip.
Vi packar mycket skidkläder till skidresan.

Counting with "ett par"

To count clothing made of two joined parts (like pants or goggles), use ett par (a pair). The noun that follows stays in the indefinite plural, and adjectives describing the clothing take the plural -a ending:

I am buying a pair of new ski pants.
Jag köper ett par nya skidbyxor.

If an adjective modifies the pair itself, it takes the -t ending because par is an ett word (e.g., ett nytt par):

My old ski goggles are broken, so I want a new pair.
Mina gamla skidglasögon är trasiga, så jag vill ha ett nytt par.

The Definite Plural

When referring to specific items rather than a general pair, use the definite plural ending (often -na or -en):

Are the suspenders lying behind the ski goggles?
Ligger hängslena bakom skidglasögonen?

To add an adjective, use the standard definite plural structure (de + adjective with -a + definite noun):

The blue long johns are warmer than the red ones.
De blå långkalsongerna är varmare än de röda.

Multiple Pairs

Because par is an ett word ending in a consonant, it does not change in the plural. "Two pairs" is simply två par:

You must pack two pairs of warm long johns.
Du måste packa två par varma långkalsonger.

Items Used in Pairs

Other gear like a ski boot (en pjäxa), a rag sock (en raggsocka), or a ski pole (en stav) have normal singular forms. However, since they are used in pairs, they are counted using the exact same rules with par:

I am putting a pair of thick rag socks in the ski boots.
Jag lägger ett par tjocka raggsockor i pjäxorna.
He has three pairs of ski poles, but he only needs one pair.
Han har tre par stavar, men han behöver bara ett par.