There are three nature resistance, here is the list of the items, hope it could be help. Just go through and have a good time in WOW!

Wrist:

1. Sandstalker Bracers (MAIL: 220AR, +7sta, +15NR) (crafted)

2. Noxxion's Shackles (PLATE: 235AR, +5sta, +15NR) (common drop from Noxxion in Maraudon)

3. Beetle Scaled Wristguards (LEATHER: +15NR, +14sta, +12int, +18AP) (common drop from Skeram in AQ40)

4. Dragonspur Wraps (LEATHER: +17Sta, +32AP, +4 Resistances) (common drop from 4D)

5. Random world drops named "of Nature Resistance" in the AH. Between 1-15 nature resistance.

Chest:

1. Sandstalker Breastplate (MAIL: 485ar, 13sta, 25nr) (Crafted)

2. Living Breastplate (LEATHER: +5NR, +10Sta, +25Spi, +26Heals) (Crafted)

3. Polychromatic Visionwrap (CLOTH: +20 resistances) (common drop from Solakar Flamewreath in UBRS)

4. All Tier2 Chestpieces have 10NR

5. Robes of the Triumvirate (CLOTH: +30NR, +21Sta, +22Int, +7mp/5sec) (Common drop from the bug family in AQ40)

6. Silithid Carapace Chestguard (PLATE: 867AR, +35NR, +23Sta, +17Str, +14Agi) (13% drop from Fankriss the Unyielding)

7. Dreamscale Breastplate (MAIL: +30NR, +15Sta, +15Agi, +14Int, +4mp/5sec) (Crafted from 4D Dreamscales, BoP until Blizzard changes it)

8. Thick Silithid Chestguard (LEATHER: +5 all resistances, +30Sta, +21Agi, +5Str) (Moam in AQ20)

9. Embrace of the Wind Serpent (CLOTH: +12NR, +30Spi, +17int, +9Sta) (unlikely drop from the Avatar of Hakkar in ST)

10. Random world drops named "of Nature Resistance" in the AH. Between 1-26 nature resistance.

Back:

1. Grovekeeper's Drape (+12sta,+10nr) (common drop off Celebras in Maraudon)

2. Fluctuating Cloak of Nature Resistance (+15NR, +3hp/5sec) (unlikely drop off Prince in DM West Library)

3. Archivist Cape of Nature Resistance (+15NR, +4mp/5sec) (goldceo.com)(unlikely drop off the Archivist in Stratholme)

4. Zephyr Cloak (+15NR) (common BoE drop off the elemental invasion boss in Silithus)

5. Cloak of the Shrouded Mists (+22Agi, +12Sta, +6FR, +6NR) (common Ragnaros drop)

6. Green Dragonskin Cloak (+12Sta, +20NR, +3hp/5sec) (common drop from 4D)

7. Random world drop cloaks named "of Nature Resistance" in the AH. Between 1-15 nature resistance.