As long as Abomasnow is your Active Pokémon, any damage done to your Pokémon by an opponent's attack is reduced by 20 (after applying Weakness and Resistance).

Snow Play

20

Does 20 damage to each of your opponent's Benched Pokémon, excluding Grass Pokémon and Water Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Below Zero

60

If Abomasnow evolved from Snover during this turn, the Defending Pokémon is now Paralyzed.