Crochet secure

1 On the WS, look at the shoulders, where the slipped stitches have been used to pickup the cardigan front sleeves and back sts:
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2 With a crochet, insert your hook inside the first slipped stitch:

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3 Wrap yarn around the hook (I use a contrasted yarn for demonstration purpose):

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4 Then insert the hook insed the next slipped stitch:

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5 Wrap the yarn around and bring it back:

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6 Slip this stitch inside the first:

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7 Repeat steps 4 to 6 until you have work all slipped stitches:

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Break yarn and pull through remaining stitch.